Integrated pressure regulating switching valve

Abstract

The invention discloses an integrated pressure regulating switching valve, which is characterized by consisting of a valve body (1), a piston valve rod (2), a sealing ring (3), a spring (4), a pilot-operated reducing valve (5) and a solenoid valve (6), wherein the piston valve rod (2) is arranged in the valve body (1); a feedback piston is arranged at the left end of the piston valve rod (2), andis in sliding seal with an inner cavity of the valve body (1); the right end of the piston valve rod (2) is connected with a switching valve element (13); a sealing ring (3) is arranged at a joint ofthe left end of the switching valve element (13) and the valve body (1) to form a switching valve; the spring (4) is arranged between the right end of the switching valve element (13) and the valve body (1); four chambers are formed in the valve body (1); and the valve body (1) is connected with the pilot-operated reducing valve (5) and the solenoid valve (6) through a high-pressure chamber and acontrol port. Therefore, a pressure regulating valve and the switching valve are integrated into an integral structure, a control pipeline is simple, a small space is occupied, and potential fault points are reduced.

Description

Technical field: [0001] The invention relates to the technical field of fluid pressure and direction control elements, in particular to a pressure regulating switch integrated valve, which is especially suitable for diesel engine gas starting systems. Background technique: [0002] At present, diesel engines are widely started with vane-type air starters. The maximum working pressure of vane-type air starters is 0.8MPa, while the rated pressure of the air source is 3MPa. Compressed air needs to be decompressed before entering the air starter. The air starting system pipeline must be equipped with pressure regulating valve and switching valve. Since most of the pressure regulating valves used in the traditional design are diaphragm feedback pressure regulating valves, the diaphragm is easily damaged. The common problems of such pressure regulating valves and switching valves are that they occupy a large space, the feedback diaphragm of the pressure regulating valve is easily...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a pressure regulating switch integrated valve, which mainly solves the problem that the existing pressure regulating valve and switching valve occupy a large space, the feedback diaphragm of the pressure regulating valve is easily damaged, and there are many system accessories. and high potential failure rate

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